Another piece of information that might help someone:
If you are using another progam that listens for notification events, it can be that this program inteferes with GadgetBridge.
For example, I had MacroDroid running, and after disabling it, Notifications worked fine.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Another piece of information that might help someone:
If you are using another progam that listens for notification events, it can be that this program inteferes with GadgetBridge.
For example, I had MacroDroid running, and after disabling it, Notifications worked fine.
Just something to think about.